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Water production using the Microbial Desalination Cell as a pre-treatment step for Revers Osmosis.

1. Applicant Information



Shift In-charge engineer

NOMAC (First National Operation & Maintenance Co)


Saudi Arabia


Dr. hedia khaled/Assistant Director of Hygiene and the Environmental Health Protection
department Tunisia

2. Criteria - Applicants Responses 

Which clean technology categories does your innovation cover?

Bioenergy & Waste To Energy

Please select the category you’re submitting your application for

New Solution

Please select the phase of your innovation:


3. Questionnaire - Applicants Responses 

Proposal/ Submission Title

Water production using the Microbial Desalination Cell as a pre-treatment step for Revers Osmosis.

Problem Statement

One of the major challenges is the availability of fresh water over the world. Water desalination can fill the gap by producing a fresh water from the brackish water or the seawater for drinking. Current the conventional Revers Osmosis (RO) has a challenging limit of minimum energy consumption ~ 2-3 kWh/m3 . A lot of work has been done in optimizing the pump’s design and operation for the RO systems. On the other hand, “hybrid systems” by combining the RO with other innovative desalination concepts show an optimistic solutions to overcome the thermodynamical limitations of the RO.
The Microbial Desalination Cell (MDC) shows the ability to treat wastewater and generate energy to be used to desalinate the saline water using an electrodialysis concept incorporated within the MDC as a pre-softening step for the RO system.

Which do you think are the innovative factors of your idea?

The main goal of the idea is to develop the ACWA POWER largest demonstrator of an innovative and low-energy technology for water production using the MDC as a pre-treatment step for RO.

Which benefits would your idea bring to the industry?

- High performance, low manufacturing cost and optimized MDC process
- High Chemical Oxygen Chemical (COD) reduction
- Low energy consumption for Seawater desalination
- Less cleaning and extended life of the ion-exchange membrane It is expected that the idea will help to increase the water resources and reduce pollution in areas where less effective waste water treatments are used at present.
- Decrease of CO2 per emission m3 of water comparing to a conventional RO system
- No aeration is needed and no sludge handling due to the use of Geobacter in an anaerobic condition

To which challenges does your idea provide a solution to?

Low energy consumption combined with Waste Water Treatment (WWT)

4. Supporting attachments and links 

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